CN107371289A - A kind of high efficiency microwave heating chamber feeds excitation system - Google Patents
A kind of high efficiency microwave heating chamber feeds excitation system Download PDFInfo
- Publication number
- CN107371289A CN107371289A CN201710507996.9A CN201710507996A CN107371289A CN 107371289 A CN107371289 A CN 107371289A CN 201710507996 A CN201710507996 A CN 201710507996A CN 107371289 A CN107371289 A CN 107371289A
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- microwave
- waveguide
- connection
- circulator
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/70—Feed lines
Abstract
The invention belongs to microwave to heat applied technical field, discloses a kind of high efficiency microwave heating chamber feed excitation system, and the high efficiency microwave heating chamber feed excitation system includes：Microwave driving source；The delivery outlet of the microwave driving source is connected to circulator first port by the first connection waveguide, and circulator second port is connected by the connection waveguide of connection second with heating cavity；3rd port of circulator is connected with one end of corner cut waveguide bend, and through being connected with one end of twist-reflector waveguide, the other end of twist-reflector waveguide is connected the other end of corner cut waveguide bend by the connection waveguide of connection the 3rd with heating cavity.The present invention is greatly improved microwave driving source and feeds the absorption efficiency of efficiency and target to microwave energy to the energy of heating chamber.
Description
Technical field
The invention belongs to microwave to heat applied technical field, more particularly to a kind of high efficiency microwave heating chamber feed excitation system
System.
Background technology
Microwave heating is a kind of energy-efficient mode of heating, and general principle is the photograph to target by HIGH-POWERED MICROWAVES
Penetrate, make illuminated target Zi in outer generation oscillating current, and produce heat and realize heating.Because microwave heating system is without dirt
Dye, efficiency high, firing rate are fast, and can synchronously realize the sterilization to target, are widely used in grain heat-drying heating, feed adds
The various aspects such as work heating, food production heating.But it is emphasized that it is being related to industrial HIGH-POWERED MICROWAVES heating neck
Domain, also face some problems：(1) when by waveguide directly excitation heating cavity, due to the input impedance and feedback of cavity feed mouth
The resistance difference of electric system is larger, causes microwave power matching is poor to cause microwave energy reflective rate too high.Not only feed
It is less efficient, form energy dissipation, and the risk for causing microwave source to be burnt by reflection power；(2) due to cavity feed mouth
Input impedance and the plant characteristic being heated in cavity-dielectric constant, the electrical conductivity parameter that such as heat target-have very big pass
System.Therefore influenceed by heating target dynamic change, it is difficult to which the input impedance of cavity feed mouth and the impedance of feed system is straight
Connect matching.(3) heating target in part only has a preferable heating effect to the electromagnetic wave of a polarization, the incidence wave of fixed polarization,
Heating effect can not ensure.These factors cause current cavity class microwave heating system feedback in the dynamic duty of reality to be present
Electric system matching is poor, feeds less efficient, heating effect is fluctuated the problem of larger by object effects；This also results in whole microwave
Heating system efficiency is relatively low, the defects of microwave source is easily burnt by reflection power be present.
In summary, the problem of prior art is present be：Feed system be present in current cavity class microwave heating system
Matching is poor, it is larger by object effects fluctuation to feed less efficient, heating effect；Cause whole microwave heating system less efficient,
Microwave source is easily burnt by reflection power.
The content of the invention
The problem of existing for prior art, the invention provides a kind of high efficiency microwave heating chamber to feed excitation system.
The present invention is achieved in that a kind of high efficiency microwave heating chamber feed excitation system, and the high efficiency microwave adds
Hot chamber feed excitation system includes：Microwave driving source；
The delivery outlet of the microwave driving source is connected to circulator first port, circulator second by the first connection waveguide
Port provides the first delivery outlet by the connection waveguide of connection second；3rd port of circulator connects with one end of corner cut waveguide bend
Connect, for the other end of corner cut waveguide bend through being connected with one end of twist-reflector waveguide, the other end of twist-reflector waveguide passes through connection
3rd connection waveguide provides the second delivery outlet.
Another object of the present invention is to provide a kind of simplified microwave heating chamber feed excitation system, it is characterised in that institute
Stating simplified microwave heating chamber feed excitation system includes：Microwave driving source；
The delivery outlet of the microwave driving source is connected to circulator first port, circulator second by the first connection waveguide
Port provides the first delivery outlet by the connection waveguide of connection second；3rd port of circulator is carried by the connection waveguide of connection the 3rd
For the second delivery outlet；
Another object of the present invention is to provide a kind of heating cavity, it is characterised in that the heating cavity with it is single or
The output port connection of multiple high efficiency microwave heating chamber feed excitation systems in parallel；
Another object of the present invention is to provide a kind of microwave disinfection purification of air cavity, it is characterised in that the microwave
Sterilizing and air-cleaning cavity is connected with the output port of single or multiple high efficiency microwave heating chamber feed excitation systems in parallel；
Another object of the present invention is to provide a kind of microwave excitation ultraviolet electrodeless lamp array cavity, it is characterised in that described
The ultraviolet electrodeless lamp array cavity of microwave excitation feeds the output of excitation systems with single or multiple high efficiency microwave heating chambers in parallel
Port connects；
Advantages of the present invention and good effect are：The one-way flow characteristic of circulator is made full use of, circulator is guided by chamber
The energy that body reflects does not flow to microwave driving source；It is again introduced into cavity by circulator port and another way waveguide and produces and swashs
Encourage；Therefore the part reflected energy is utilized, improves the energy utilization efficiency of system：Cavity direct feed reflection effect
When rate is 50%, the present invention can be brought up to 75% or so, and when direct feed reflection efficiency is 75%, the present invention can be with
Brought up to 93% or so.Therefore, because energy, which does not flow directly into microwave driving source, avoids microwave driving source by disturbance shape
Into burn risk；It can avoid foring magnetron pattern by reflection power and redirect and burn.Using twist-reflector waveguide, make
Orthogonal characteristic is presented in the two-way microwave of feed-in cavity in polarization, and it is only quick to a polarised direction electric wave to avoid some targets
Sense and caused by heating effect is high, cavity input oral reflex is big situation.Using lose-lose entrance, can encourage in cavity
More abundant mode configuration, such as the various TE in rectangular cavitiesmnpAnd TMmnpPattern, these pattern field distribution are different,
The multi-absorption of target is caused, enhances the heating uniformity of target.Corner cut structure is introduced in the crooked position of waveguide, it is ensured that
Reflex control is in minimum during waveguide transmission.
In summary, compared with prior art, it is of the invention in common direct reflectivity about 50%-75% scope
Feed microwave energy efficiency can improve 20% or so, and the system also has together to the efficiency of heating surface of target, heating uniformity in addition
Step lifting；And avoid the overall performance that high-power microwave source is burnt the system of greatly improving by reflection power.
Brief description of the drawings
Fig. 1 is high efficiency microwave heating chamber feed excitation system structural representation provided in an embodiment of the present invention；
Fig. 2 is the high efficiency microwave heating system schematic diagram provided in an embodiment of the present invention using two groups of excitation systems；
Fig. 3 is feed efficiency comparison chart provided in an embodiment of the present invention；
In figure：1st, microwave driving source；2nd, the first connection waveguide；3rd, circulator；4th, the second connection waveguide；5th, microwave heats
Chamber；6th, corner cut waveguide bend；7th, twist-reflector waveguide；8th, the 3rd connection waveguide；9th, target is heated.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
The application principle of the present invention is explained in detail below in conjunction with the accompanying drawings.
As shown in figure 1, high efficiency microwave heating chamber feed excitation system provided in an embodiment of the present invention includes：Microwave excitation
Source 1, first connects waveguide 2, circulator 3, second connects waveguide 4, microwave heating chamber 5, corner cut waveguide bend 6, twist-reflector waveguide
7th, the 3rd connection waveguide 8, heating target 9.
The delivery outlet of microwave driving source 1 is connected to 1 port of circulator 3 by the first connection waveguide 2, and the end of circulator 2 leads to
The connection waveguide 4 of connection second is crossed to be connected with heating cavity；3 ports of circulator are connected with one end of corner cut waveguide bend 6, and corner cut is curved
The other end of waveguide 6 is connected with one end of twist-reflector waveguide 7, and the other end of twist-reflector waveguide 7 is connected waveguide 8 with the 3rd and connected
Connect, the 3rd connection other end of waveguide 8 is connected with heating cavity 5, and the dual polarization microwave field in heating cavity 5 adds to heating target 9
Heat.
The present invention can also exchange twist-reflector waveguide 7 and the connection order of corner cut waveguide bend 6 according to installation environment；That is,
3 ports of circulator are connected with one end of twist-reflector waveguide 7, the other end connection corner cut waveguide bend 6 of twist-reflector waveguide 7
One end, one end that the other end of corner cut waveguide bend 6 is connected waveguide 8 with the 3rd connect, the 3rd connection other end of waveguide 8 and heating chamber
Body 5 connects, and the dual polarization microwave field in heating cavity 5 heats to heating target 9.
For the insensitive material that polarizes, it also can be selected and be added without twist-reflector waveguide 7.I.e. 3 ports of circulator are with cutting
One end connection of angle waveguide bend 6, the other end of corner cut waveguide bend 6 are connected waveguide 8 with the 3rd and connected, and the 3rd connection waveguide 8 is another
End is connected with heating cavity 5, and the dual polarization microwave field in heating cavity 5 heats to heating target 9.
The present invention can also use multigroup excitation system as shown in Figure 2 to be operated.
The delivery outlet energy of the microwave driving source of the present invention is connected to 1 port of circulator, warp by the first connection waveguide
Exported after circulator by 2 ports, then heating cavity 5 is entered by the connection waveguide of connection second heating target 9 is heated.Portion
After dividing energy to reflect, circulator port is entered after the second connection waveguide and is exported by 3 ports of circulator, the part
Energy, into twist-reflector waveguide, forms the incoming signal of another polarization and through the 3rd connection ripple after corner cut waveguide bend
Feed-in heating cavity is led further to heat target.
It is explained in detail with reference to the application effect to comparing the present invention.
With traditional microwave driving source compared with cavity is by way of waveguide is joined directly together, it can be seen that present invention system
The Heterosis of system exists：
(1) generally under situation, certain reflection can be formed by the energy of the second connection waveguide feed-in cavity.Traditional feed side
In formula, the portion of energy will be directed into microwave source, and very big influence is caused to microwave source, by taking magnetron as an example, the energy
Magnetron moding will be caused or even burnt.And after using the device of the present invention, the portion of energy is by circulator and subsequently
Waveguide imports cavity again, therefore on the one hand the part reflected energy is utilized, and improves the energy utilization effect of system
Rate, on the other hand formed because the portion of energy does not flow directly into microwave driving source and avoids microwave driving source by big signal disturbance
Burn risk；
(2) after carrying out twist-reflector to ripple using twist-reflector waveguide, the two-way microwave of feed-in cavity is made in polarization
Orthogonal characteristic is presented, by such setting, target successively has the process absorbed twice to not like-polarized ripple, therefore
Avoid some targets it is only sensitive to polarised direction electric wave and caused by that heating effect is high, cavity inputs oral reflex is big
Situation；
(3) set using lose-lose entrance, the more abundant pattern in cavity can have been encouraged due to input position difference
Structure, enhance the heating uniformity of target；
(4) by being constituted in the second connection waveguide, circulator 2-3 ports, corner cut waveguide bend, twist-reflector waveguide, cavity
One loop, the chance that energy is absorbed repeatedly by target is provided to a certain extent, substantially increases microwave energy utilization rate.
Fig. 3 give by the present invention binary channels feed after to feed efficiency lifting effect.Wherein abscissa is ripple
Lead the reflectivity that direct feed is carried out to the cavity of the target containing heating.Two curves are non-not to be given direct feed and uses this hair
The feed efficiency of bright proposed method.Absorbed it can be seen that having carried out feeding again to reflection power, system feed efficiency
There is 20 or so lifting in 50-85% section in direct feed reflectivity corresponding to the work of usual system.
The microwave excitation system of the present invention can be used for any other applicable field, such as by taking microwave heating chamber body as an example
Purification of air cavity and microwave excited ultraviolet electrodeless lamp array cavity to microwave disinfection etc..
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (5)
1. a kind of high efficiency microwave heating chamber feeds excitation system, it is characterised in that the high efficiency microwave heating chamber feed swashs
The system of encouraging includes：Microwave driving source；
The delivery outlet of the microwave driving source is connected to circulator first port, circulator second port by the first connection waveguide
The first delivery outlet is provided by the connection waveguide of connection second；3rd port of circulator is connected with one end of corner cut waveguide bend, is cut
Through being connected with one end of twist-reflector waveguide, the other end of twist-reflector waveguide is connected the other end of angle waveguide bend by connection the 3rd
Connect waveguide and the second delivery outlet is provided.
A kind of 2. simplified microwave heating chamber feed excitation system, it is characterised in that the simplified microwave heating chamber feed excitation system
System includes：Microwave driving source；
The delivery outlet of the microwave driving source is connected to circulator first port, circulator second port by the first connection waveguide
The first delivery outlet is provided by the connection waveguide of connection second；3rd port of circulator provides the by the connection waveguide of connection the 3rd
Two delivery outlets.
3. a kind of heating cavity, it is characterised in that the heating cavity and single or multiple high efficiency microwave heating chambers in parallel
Feed the output port connection of excitation system.
A kind of 4. microwave disinfection purification of air cavity, it is characterised in that the microwave disinfection purification of air cavity with it is single or more
The output port connection of individual high efficiency microwave heating chamber feed excitation system in parallel.
A kind of 5. ultraviolet electrodeless lamp array cavity of microwave excitation, it is characterised in that the ultraviolet electrodeless lamp array cavity of microwave excitation with
The output port connection of single or multiple high efficiency microwave heating chamber feed excitation systems in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710507996.9A CN107371289A (en) | 2017-06-28 | 2017-06-28 | A kind of high efficiency microwave heating chamber feeds excitation system |
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| CN201710507996.9A CN107371289A (en) | 2017-06-28 | 2017-06-28 | A kind of high efficiency microwave heating chamber feeds excitation system |
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| CN107371289A true CN107371289A (en) | 2017-11-21 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108012363A (en) * | 2017-11-30 | 2018-05-08 | 广东美的厨房电器制造有限公司 | Microwave heating equipment |
| CN108598658A (en) * | 2018-05-25 | 2018-09-28 | 上海点为智能科技有限责任公司 | Triantennary compensating heating device in restricted clearance |
| CN108767439A (en) * | 2018-05-25 | 2018-11-06 | 上海点为智能科技有限责任公司 | Double antenna compensating heating device in restricted clearance |
| CN109729612A (en) * | 2018-12-17 | 2019-05-07 | 四川大学 | A kind of dual-port microwave thawing cavity of high uniformity |
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| JP2006210132A (en) * | 2005-01-28 | 2006-08-10 | Oshikiri:Kk | Microwave heating device |
| CN102631696A (en) * | 2012-04-16 | 2012-08-15 | 武汉纺织大学 | Electrodeless UV (Ultraviolet) source air cleaning and sterilizing method and device |
| CN102946656A (en) * | 2012-11-13 | 2013-02-27 | 南华大学 | Multi-mode microwave heating cavity for treating dump leaching uranium ore |
| CN105650699A (en) * | 2016-03-29 | 2016-06-08 | 广东美的厨房电器制造有限公司 | Microwave cooking appliance |
| CN106686792A (en) * | 2015-11-05 | 2017-05-17 | 财团法人工业技术研究院 | Multi-modal microwave heating device |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006210132A (en) * | 2005-01-28 | 2006-08-10 | Oshikiri:Kk | Microwave heating device |
| CN102631696A (en) * | 2012-04-16 | 2012-08-15 | 武汉纺织大学 | Electrodeless UV (Ultraviolet) source air cleaning and sterilizing method and device |
| CN102946656A (en) * | 2012-11-13 | 2013-02-27 | 南华大学 | Multi-mode microwave heating cavity for treating dump leaching uranium ore |
| CN106686792A (en) * | 2015-11-05 | 2017-05-17 | 财团法人工业技术研究院 | Multi-modal microwave heating device |
| CN105650699A (en) * | 2016-03-29 | 2016-06-08 | 广东美的厨房电器制造有限公司 | Microwave cooking appliance |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108012363A (en) * | 2017-11-30 | 2018-05-08 | 广东美的厨房电器制造有限公司 | Microwave heating equipment |
| CN108598658A (en) * | 2018-05-25 | 2018-09-28 | 上海点为智能科技有限责任公司 | Triantennary compensating heating device in restricted clearance |
| CN108767439A (en) * | 2018-05-25 | 2018-11-06 | 上海点为智能科技有限责任公司 | Double antenna compensating heating device in restricted clearance |
| CN109729612A (en) * | 2018-12-17 | 2019-05-07 | 四川大学 | A kind of dual-port microwave thawing cavity of high uniformity |
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| CB02 | Change of applicant information |
Address after: Room 707-6, building 1, Suzhou nano City, No. 99, Jinjihu Avenue, Suzhou Industrial Park, Suzhou, Jiangsu Province Applicant after: Suzhou yinbian Photoelectric Technology Co., Ltd Address before: 710065 Shaanxi city of Xi'an province high tech Zone Jinye Road No. 32 Building 1 unit third Jin industry era 13 layer 11309. Applicant before: XI'AN ENBIENS PHOTOELECTRIC Co.,Ltd. |
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Application publication date: 20171121 |
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| RJ01 | Rejection of invention patent application after publication |